<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>2</title>
    <style>
        * {
            margin: 0;
            padding: 0;
        }

        h2 {
            height: 600px;
            display: flex;
            justify-content: center;
            align-items: center;
            color: rgb(63, 162, 89);
            font-size: 30px;
            text-shadow: 1px 1px rgba(0, 0, 0, .5),
                2px 2px rgba(0, 0, 0, .5);
        }
    </style>
</head>

<body>
    <h2>提交成功</h2>

</body>

</html>